/*
 * 国产精品 (51video_ucajk53) - 全站核心样式表
 * 设计风格：方案一 赛博霓虹与二次元极客风格 (Cyber-Neon & Anime Tech)
 * 特点：深色背景、霓虹流光、精致边框、动态弹幕、微交互、响应式适配
 */

/* ==========================================
   1. 基础重置与变量定义
   ========================================== */
:root {
    --bg-dark: #08050e;
    --bg-card: #120d1e;
    --bg-card-hover: #1b142c;
    --primary-neon: #ff2e93;
    --primary-neon-glow: rgba(255, 46, 147, 0.4);
    --secondary-neon: #00f0ff;
    --secondary-neon-glow: rgba(0, 240, 255, 0.4);
    --text-main: #ffffff;
    --text-muted: #a5a1b8;
    --text-dark: #646077;
    --border-color: #261d3a;
    --border-glow: rgba(165, 161, 184, 0.1);
    --transition-snappy: all 0.2s cubic-bezier(0.23, 1, 0.32, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.77, 0, 0.175, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border-color: var(--border-color);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ==========================================
   2. 常用布局与网格工具
   ========================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.v2zl42u { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.t33b45 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.w57wl4ly { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; }

@media (max-width: 1024px) {
    .w57wl4ly { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .t33b45 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .w57wl4ly, .t33b45, .v2zl42u { grid-template-columns: 1fr; }
    .container { padding: 0 1rem; }
}

/* ==========================================
   3. 品牌Logo与导航栏 (Header)
   ========================================== */
header {
    background-color: rgba(8, 5, 14, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition-snappy);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-area a {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.5rem;
}

.m2g16 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 15px var(--primary-neon-glow);
}

.e04rl3bi {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.e04rl3bi a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-snappy);
    position: relative;
    padding: 0.5rem 0;
}

.e04rl3bi a:hover, .e04rl3bi a.active {
    color: var(--primary-neon);
    text-shadow: 0 0 8px var(--primary-neon-glow);
}

.e04rl3bi a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-neon);
    box-shadow: 0 0 8px var(--primary-neon);
    transition: var(--transition-snappy);
}

.e04rl3bi a:hover::after, .e04rl3bi a.active::after {
    width: 100%;
}

.la365g {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 移动端菜单按钮 */
.t70hqfv {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}
.t70hqfv span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition-snappy);
}

@media (max-width: 768px) {
    .e04rl3bi {
        display: none; /* 移动端抽屉或隐藏，用JS控制 */
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-dark);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border-color);
    }
    .e04rl3bi.active {
        display: flex;
    }
    .t70hqfv {
        display: flex;
    }
}

/* ==========================================
   4. 搜索框组件 (头部导航下方)
   ========================================== */
.rsj0ql {
    background-color: rgba(18, 13, 30, 0.4);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
}

.k7e22a {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.rs6v2u {
    width: 100%;
    background-color: rgba(8, 5, 14, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    padding: 0.6rem 1.5rem 0.6rem 3rem;
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-snappy);
}

.rs6v2u:focus {
    border-color: var(--primary-neon);
    box-shadow: 0 0 10px var(--primary-neon-glow);
}

.r9umw {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* ==========================================
   5. 首屏巨幕 (Hero Section)
   ========================================== */
.jzultgd6 {
    position: relative;
    padding: 6rem 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.jzultgd6::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(8, 5, 14, 0.4) 0%, rgba(8, 5, 14, 0.95) 100%);
    z-index: 1;
}

.r846h3 {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.nhaob {
    display: inline-block;
    background-color: rgba(255, 46, 147, 0.15);
    border: 1px solid var(--primary-neon);
    color: var(--primary-neon);
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 5px var(--primary-neon-glow);
}

.xxygeu {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.xxygeu span {
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.b3w5vbss {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.bi72h6 {
    display: flex;
    gap: 1rem;
}

@media (max-width: 768px) {
    .xxygeu { font-size: 2.5rem; }
    .b3w5vbss { font-size: 1rem; }
    .bi72h6 { flex-direction: column; }
}

/* ==========================================
   6. 按钮样式 (Buttons)
   ========================================== */
.ry8bkye {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-snappy);
    gap: 0.5rem;
}

.ry8bkye:active {
    transform: scale(0.97);
}

.ylwg9amd {
    background-color: var(--primary-neon);
    color: var(--text-main);
    box-shadow: 0 4px 15px var(--primary-neon-glow);
    border: 1px solid var(--primary-neon);
}

.ylwg9amd:hover {
    background-color: #ff52a6;
    box-shadow: 0 6px 20px var(--primary-neon);
}

.kr6mkbs {
    background-color: rgba(18, 13, 30, 0.6);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.kr6mkbs:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--secondary-neon);
    box-shadow: 0 0 10px var(--secondary-neon-glow);
}

/* ==========================================
   5.5 面包屑导航 (百度SEO最佳实践)
   ========================================== */
.rsbl7 {
    background-color: rgba(18, 13, 30, 0.4);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    font-size: 0.85rem;
}
.zrw92ioz {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}
.zrw92ioz li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}
.zrw92ioz li a:hover {
    color: var(--primary-neon);
}
.zrw92ioz li.active {
    color: var(--secondary-neon);
    font-weight: bold;
}
.zrw92ioz .separator {
    color: var(--text-dark);
}

/* ==========================================
   7. 卡片与视频卡片样式 (Cards & Video Cards)
   ========================================== */
.inau53 {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-snappy);
    position: relative;
}

.inau53:hover {
    transform: translateY(-5px);
    border-color: var(--primary-neon);
    box-shadow: 0 10px 25px rgba(255, 46, 147, 0.15);
}

.m6uo1iq {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: #000;
}

.m6uo1iq img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.inau53:hover .m6uo1iq img {
    transform: scale(1.05);
}

/* 悬停播放按钮 (JS/H5实现) */
.ylsd1qf5 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(8, 5, 14, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-snappy);
}

.inau53:hover .ylsd1qf5 {
    opacity: 1;
}

.e7nz2 {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--primary-neon);
    transform: scale(0.9);
    transition: var(--transition-snappy);
}

.inau53:hover .e7nz2 {
    transform: scale(1);
}

.e7nz2 svg {
    fill: var(--text-main);
    width: 20px;
    height: 20px;
    margin-left: 3px; /* 三角形居中微调 */
}

.dq8aqk {
    padding: 1.25rem;
}

.zox1o {
    font-size: 0.75rem;
    color: var(--secondary-neon);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.daz9e {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.4;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mxto9 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(165, 161, 184, 0.1);
    padding-top: 0.75rem;
    margin-top: 0.75rem;
}

.ql5y0an {
    display: flex;
    gap: 0.8rem;
}

.ql5y0an span {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

/* ==========================================
   8. 动态弹幕互动区域 (Danmaku Section)
   ========================================== */
.prdqt2k {
    background-color: #0b0716;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    overflow: hidden;
    position: relative;
}

.jvpaemx {
    display: flex;
    white-space: nowrap;
    animation: danmaku-move 25s linear infinite;
    gap: 3rem;
}

.n976kua {
    display: flex;
    white-space: nowrap;
    animation: danmaku-move-reverse 30s linear infinite;
    gap: 3rem;
    margin-top: 1rem;
}

.nrvbp29 {
    background-color: rgba(18, 13, 30, 0.8);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.nrvbp29.neon-pink { border-color: var(--primary-neon); color: var(--primary-neon); }
.nrvbp29.neon-blue { border-color: var(--secondary-neon); color: var(--secondary-neon); }

@keyframes danmaku-move {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes danmaku-move-reverse {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

/* ==========================================
   9. 板块标题 (Section Headers)
   ========================================== */
.cmkqf7 {
    margin-bottom: 3rem;
    position: relative;
}

.uaftz {
    color: var(--primary-neon);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    display: block;
}

.mixiwud {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-main);
    position: relative;
    display: inline-block;
}

.mixiwud::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-neon), var(--secondary-neon));
    box-shadow: 0 0 8px var(--primary-neon);
}

/* ==========================================
   10. 专家展示模块 (Experts Showcase)
   ========================================== */
.lbfh03y {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition-snappy);
}

.lbfh03y:hover {
    border-color: var(--secondary-neon);
    box-shadow: 0 10px 25px rgba(0, 240, 255, 0.15);
    transform: translateY(-5px);
}

.bhxy46 {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    border: 2px solid var(--secondary-neon);
    box-shadow: 0 0 15px var(--secondary-neon-glow);
    object-fit: cover;
}

.expert-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.expert-title {
    color: var(--primary-neon);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.expert-bio {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    height: 4.5rem;
    overflow: hidden;
}

.expert-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ==========================================
   11. FAQ与折叠面板 (FAQ Accordion)
   ========================================== */
.faq-section {
    padding: 5rem 0;
    background-color: rgba(18, 13, 30, 0.2);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.tungx {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition-snappy);
}

.h5fwxx0h {
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    user-select: none;
}

.h5fwxx0h:hover {
    background-color: var(--bg-card-hover);
    color: var(--primary-neon);
}

.ey9r8d8b {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid transparent;
}

.tungx.active .ey9r8d8b {
    padding: 1.25rem 1.5rem;
    max-height: 200px; /* 足够容纳内容 */
    border-top-color: var(--border-color);
}

.h62y9 {
    transition: transform 0.3s ease;
}

.tungx.active .h62y9 {
    transform: rotate(180deg);
    color: var(--primary-neon);
}

/* ==========================================
   12. 真实口碑与评价 (Testimonials)
   ========================================== */
.a4h5ch {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
}

.gp0vgcwt {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.q8qtzjc0 {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.i3cho {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 1px solid var(--primary-neon);
    object-fit: cover;
}

.bd3je h4 {
    font-size: 0.95rem;
    font-weight: 700;
}

.bd3je span {
    font-size: 0.8rem;
    color: var(--text-dark);
}

/* ==========================================
   13. 页脚信息 (Footer)
   ========================================== */
footer {
    background-color: #050309;
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.footer-brand p {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.footer-title {
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-snappy);
}

.footer-links a:hover {
    color: var(--primary-neon);
}

.footer-qrcodes {
    display: flex;
    gap: 1.5rem;
}

.qrcode-box {
    text-align: center;
}

.qrcode-img {
    width: 90px;
    height: 90px;
    background-color: #fff;
    border-radius: 6px;
    padding: 5px;
    margin-bottom: 0.5rem;
}

.qrcode-box span {
    font-size: 0.75rem;
    display: block;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

@media (max-width: 640px) {
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

/* ==========================================
   14. 页面特定组件及实用工具
   ========================================== */
.text-neon-pink { color: var(--primary-neon); text-shadow: 0 0 5px var(--primary-neon-glow); }
.text-neon-blue { color: var(--secondary-neon); text-shadow: 0 0 5px var(--secondary-neon-glow); }

.xat4it {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.gxw0tn60 { background-color: rgba(255, 46, 147, 0.15); border: 1px solid var(--primary-neon); color: var(--primary-neon); }
.qaiax6 { background-color: rgba(0, 240, 255, 0.15); border: 1px solid var(--secondary-neon); color: var(--secondary-neon); }

/* 原创Logo图标 */
.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    border-radius: 8px;
    position: relative;
    box-shadow: 0 0 10px var(--primary-neon-glow);
}

.logo-icon::before {
    content: '51';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-weight: 900;
    font-size: 0.9rem;
}

/* 延迟加载占位 */
.lazy-bg {
    background-color: #0b0716;
    transition: background-image 0.3s ease-in;
}

/* 一键分享面板 */
.share-panel {
    display: flex;
    gap: 0.5rem;
}
.share-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(18, 13, 30, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    transition: var(--transition-snappy);
    font-size: 0.8rem;
}
.share-btn:hover {
    color: var(--text-main);
    border-color: var(--primary-neon);
    background-color: var(--primary-neon-glow);
}